JP4180763B2 - Handle structure of walking type tiller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a handle structure of a walking type tiller that can easily change the handle position according to the downsizing of the tiller during transportation and storage and the tilling work.
[0002]
[Prior art]
For example, (1) Japanese Utility Model Publication No. Sho 60-12783 “Operating Handle Adjusting Device for Power Tiller” and (2) Japanese Utility Model Publication No. 46-34651 “Walking Type Movement with Adjustable Handle Frame Body” As shown in “Agricultural machinery”, the cultivator itself or the agricultural machinery advances with the power of the engine, but the worker walks with the cultivator or agricultural machinery.
[0003]
Specifically, according to FIG. 1 of the publication, the tiller 1 of the above (1) rotates the rotary tillage claw 3 with the engine 5 (the sign is the same as that of the publication, and the same applies hereinafter) and plows it. Self-propelled. An operator (operator) puts his hand on the operation handle 9 and appropriately operates levers attached to the operation handle 9. As shown by an imaginary line, the operation handle 9 can be turned right or left as required.
[0004]
According to FIG. 1 of the publication, the agricultural machine of the above (2) runs on its own by turning the drive wheel 9 with the engine 8. An operator (operator) performs driving by holding the grip 17 with his / her hand. This agricultural machine is characterized in that the handgrip 17 can be inverted 180 °, and can prevent a decrease in farm work efficiency due to a U-turn.
[0005]
[Problems to be solved by the invention]
The figure of the cultivator shown in Fig. 1 of (1) above corresponds to the figure of the farm equipment manufacturer, the figure at the farm equipment dealer, and the figure at the field. When this tiller is transported or stored, it is transported or stored in the state shown in FIG. 1 or with the operation handle 9 removed. As shown in FIG. 1, since the operation handle 9 is extended greatly, the loading area during transportation is large, the number of transportation machines cannot be increased, and the transportation cost increases, so that it is stored in a warehouse or the like. However, the storage area becomes large and the storage cost increases. Although removal of the operation handle 9 can reduce transportation costs and storage costs, the operation handle 9 must be assembled.
[0006]
In addition, as shown in FIG. 1 of the above (2), it is conceivable to reduce the loading area and the storage area by reversing the grip 17, but as is clear from FIG. There is no effect of reducing the mounting area and storage area.
Accordingly, an object of the present invention is to provide a handle structure for a walking type tiller that can easily change the handle position in accordance with the downsizing of the tiller during transportation and storage and the tilling work.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a power source such as an engine is mounted on the body frame, and a tilling claw driven by the power source is disposed under the body frame, and the operation handle is obliquely upward from the rear part of the body frame. In the walking type tiller with the length extended, the operation handle is provided with a bent portion at a level substantially equal to the upper surface level of the engine. A long bolt is provided so that the upper part of the handle can be turned forward around the long bolt, and a long hole that engages with the long bolt is provided in the upper part of the handle, and the upper part of the handle is elongated before folding the upper part of the handle forward. It is possible to move backward by the length of the handle and to move the upper portion of the handle backward by the length of the long hole after folding the handle upper portion forward. Characterized in that it was.
[0008]
The operating handle that extends diagonally upward from the machine body frame can be bent, and the upper part of the handle is turned forward during transportation and storage. In addition, by reversing the upper part of the handle by the length of the long hole after inversion, further downsizing is achieved.
[0009]
Further , according to the first aspect of the present invention, the lower part of the handle includes a handle post, a slide shaft that is slidably inserted into the handle post from above, and a handle post tightening mechanism that fixes the slide shaft to the handle post by reducing the diameter of the handle post. It is characterized by comprising.
[0010]
A part of the operation handle is composed of a handle post and a slide shaft, and the length of the operation handle is adjusted by sliding the slide shaft with respect to the handle post. As a result, the height of the grip from the ground can be changed.
[0011]
Further , according to the first aspect of the present invention, a fan plate is mounted substantially horizontally on the upper portion of the slide shaft, a swing bracket having a pivot point at the position of the fan plate is mounted on the fan plate, and an upper portion of the handle is mounted on the swing bracket. It is characterized in that the position of the upper part of the handle can be changed in the turning direction by extending the pin from the front and selectively inserting the pin into a plurality of retaining holes opened on the fan plate side.
[0012]
The operation handle is provided with a fan plate and a swivel bracket so that the upper part of the handle can be swiveled horizontally. It is effective to turn the upper part of the handle to the right or left when you do not want to step on the soil immediately after tilling.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a walk-type field cultivator according to the present invention. A walk-type field cultivator (hereinafter referred to as a field cultivator) 10 mounts an engine 12 as a power source on a casing 11 that also serves as a body frame. The power of the engine 12 is transmitted to the tillage shaft 17 via the clutch 13, the vertical shaft 14, and the bevel gear sets 15, 16 and the tillage pawl 18 is rotated, so that it is a small field cultivator that is self-propelled while plowing. The operation handle 20 is extended obliquely upward from the rear, and the operator is a walking type tiller that he / she takes with his / her hand on the grip 22 of the operation handle 20.
[0014]
Reference numeral 19 denotes a resistance rod. By inserting the resistance rod 19 into the soil, the tiller depth H of the tillage claw 18 is set and a resistance force against the traction force of the tillage claw 18 is added.
Further, the operation handle 20 includes a bent portion 21 at a level substantially equal to the upper surface level LL of the engine 12, with the bent portion 21 as a boundary, the lower portion is a handle lower portion 25, and the upper portion is a handle upper portion 70. It is characterized in that it can be reversed forward with respect to the lower portion 25.
[0015]
Furthermore, the handle lower part 25 is fixed to the handle post 26 by reducing the diameter of the handle post 26 and the handle post 26, the slide shaft 27 inserted from above into the handle post 26 so as to be slidable. The handle post tightening mechanism 29 is configured. That is, the upper and lower slide mechanisms 30 of the operation handle are constituted by the upper portion of the handle post 26, the lower portion of the slide shaft 27, and the handle post tightening mechanism 29.
[0016]
The detailed structure of the operation handle 20 will be described in order below.
FIG. 2 is an exploded perspective view of the up-and-down sliding mechanism of the operating handle employed in the present invention. More specifically, a slit 31 having a predetermined length is provided on the upper portion of the handle post 26, and the slit 31 is closed. The band 32 is wound in such a manner that a nut 33 and a sleeve 34 are attached to both ends of the band 32, a bolt 35 is inserted from the sleeve 34, and the tip of the bolt 35 is screwed into the nut 33. By operating the lever 36, the diameter of the upper portion of the handle post 26 can be reduced. That is, the handle post tightening mechanism 29 is configured by the slit groove 31, the band 32, the nut 33, the sleeve 34, the bolt 35, and the lever 36.
[0017]
First, the resin sleeve 40 is fitted onto the handle post 26 from above. The resin sleeve 40 is a cylindrical member that can be expanded and contracted by applying a slit 41, and is provided with a flange 42 at one end, a vertical protrusion 43 on the inner surface, and dowels 44, 44 on the outer surface. By fitting the dowels 44 and 44 into the small holes 45 and 45 on the handle post 26 side, the resin sleeve 40 is prevented from rotating or coming out after fitting into the handle post 26.
[0018]
Further, a vertical groove 47 is provided in the slide shaft 27 (this slide shaft may be hollow or solid), and a screw 48 is screwed into the lower portion of the vertical groove 47.
[0019]
FIG. 3 is a longitudinal sectional view of the vertical sliding mechanism of the operation handle according to the present invention. The resin sleeve 40 is fitted into the handle post 26, and the slide shaft 27 is inserted into the resin sleeve 40 from above. Is fitted in the vertical groove 47, the slide shaft 27 can be lowered as shown by the arrow (1) without rotating. Further, when the slide shaft 27 is raised as shown by the arrow (2), the screw 48 finally hits the lower end of the vertical protrusion 43. This is the upper limit of the slide shaft 27.
[0020]
FIG. 4 is a plan sectional view of the vertical slide mechanism of the operating handle according to the present invention. When the band 32 is loosened by grasping the lever 36 and turning the bolt 35, the slide shaft 27 can be slid in the front and back direction. it can. If the band 35 is tightened to reduce the diameter of the band 32, the slide shaft 27 can be fixed to the handle post 26 at that position.
If the screw of the nut 33 and the bolt 35 is a double thread, the screw lead is apparently doubled, and the bolt 35 can be loosened / tightened with less rotation of the bolt 35.
[0021]
With the above configuration, the level of the grip 22 can be freely set according to the height and preference of the operator as indicated by the imaginary line in FIG.
The tilt huddle used in jet skis (one- or two-seater small motor boat) can connect the upper part of the handle to the lower part of the handle with a hinge and swing the upper part of the handle with the hinge as a bending point. However, in such a tilt handle, the angle of the grip changes in proportion to the tilt angle, so the driver must bend the wrist or elbow to absorb the change.
In this respect, in this embodiment, the grip 22 moves up and down in parallel as shown by the solid line and the imaginary line in FIG. 1, so that the operator does not have to bend the wrist and elbow exceptionally, and the fatigue caused by the work is reduced. Can be reduced.
[0022]
Next, the structure and operation of the bent portion 21 will be described.
FIG. 5 is an exploded perspective view of the fan plate and the bent portion according to the present invention. A fan plate 51 is mounted substantially horizontally on the upper portion of the slide shaft 27, and a bolt hole 52 is opened in a main portion of the fan plate 51. An arc groove 53 is formed around the bolt hole 52, and the peripheral portion of the fan plate 51 is raised to form a peripheral wall 54. The peripheral wall 54 has a plurality of retaining holes 55, 55, 55 (the number is arbitrary). Open.) The revolving bracket 60 mounted on the fan plate 51 has a bolt hole 62 and an arc groove 63 formed in the bottom of the channel-shaped bracket body 61, and the bolt hole 62 and the bolt hole 52 on the fan plate 51 side are connected to the bolt 64. The bracket body 61 is attached to the fan plate 51 so as to be horizontally rotatable by fastening with the nut 65. Reference numeral 66 denotes a headed pin that extends between the arc groove 63 on the bracket body 61 side and the arc groove 53 on the fan plate 51 side.
[0023]
The left and right walls of the channel-shaped bracket body 61 are spanned with a sleeve 68 and a U holder 69 having a U cross section opened rearward. In addition, oblong plates 72L and 72R are attached to the horizontal pipe portion 71 of the handle upper portion 70, and sufficiently long long holes 73 and 73 are opened in the plates 72L and 72R, respectively. In addition, a handle lock lever 75 in which a long bolt 76, a lock claw 77, and a lever 78 are integrally formed is prepared.
[0024]
Then, the horizontal pipe portion 71 is applied to the U holder 69, the plates 72L and 72R are attached to both ends of the sleeve 68, the long bolt 76 of the handle lock lever 75 is connected to the long hole 73 of the one plate 72R, the sleeve 68, and the other. Is passed through the long hole 73 of the plate 72L and screwed into the lock nut 79. In this manner, the handle upper portion 70 can be attached to the turning bracket 60.
[0025]
FIG. 6 is a cross-sectional view of a fan plate and a bent portion according to the present invention. A fan plate 51 is attached to a slide shaft 27, a revolving bracket 60 is mounted on the fan plate 51, and a bolt 64, that is, the main (clamp) of the fan is centered. 4 shows that the turning bracket 60 can be turned in the front and back direction of the drawing, and the handle upper part 70 is attached to the U holder 69 of such a turning bracket 60.
In addition, the pin 81 is extended from the revolving bracket 60, and the revolving bracket 60 is kept in a non-revolving state by inserting the pin 81 into the retaining hole 55 of the peripheral wall 54. The pin 81 is slidably accommodated in the guide cylinder 82, is pushed forward by a spring 83, and is configured to be retracted by manually pulling the wire 84 and the T-shaped grip 85.
[0026]
FIG. 7 is a plan sectional view of the turning holder according to the present invention. The T-shaped grip 85 is pulled, the pin 81 is removed from the center stop hole 55, the turn bracket 60 is turned right, and the pin 81 is turned to the right stop hole 55. It is shown that the pin 81 can be inserted into the left stop hole 55 by turning the swivel bracket 60 to the left.
[0027]
FIG. 8 is a plan view of the cultivator according to the present invention. When the pin 81 is pulled out / inserted by pulling / returning the T-shaped grip 85, the handle upper portion 70 indicated by the imaginary line is turned to the position indicated by the solid line. Show that you can.
Depending on the type of farm work, workers do not want to step on the soil immediately after plowing. At this time, if the handle upper part 70 can be turned to the position of the solid line, the operator can continue the work without stepping on the cultivated soil immediately after tilling.
[0028]
Next, the operation of the bent portion will be described.
FIG. 9 is a perspective view showing a bent portion at the time of working. At the time of agricultural work, the plates 72L and 72R are placed with long bolts 76 and lock nuts 79 indicated by imaginary lines in a state where the horizontal pipe portion 71 is left in the U holder 69. While fixing to the turning bracket 60, the lock claw 77 is hooked on the horizontal pipe part 71. Since the lock nut 79 is provided with an idling stop (not shown), it does not rotate idly.
[0029]
Therefore, basically, the plates 72 </ b> L and 72 </ b> R can be firmly fixed to the turning bracket 60 by screwing the long bolt 76 into the lock nut 79. If this tightening is loosened, there is a possibility that the lateral pipe portion 71 may come off from the U holder 69. However, since the lock claw 77 is hooked on the horizontal pipe portion 71, the horizontal pipe portion 71 does not come off from the U holder 69. This is the reason why the lock claw 77 is provided.
[0030]
In order to bend the handle upper part 70, the lever 78 is first pulled as shown by the arrow (3). As a result, the lock claw 77 is disengaged from the lateral pipe portion 71 (arrow (4)), and the long bolt 76 is loosened with respect to the lock nut 79.
[0031]
FIG. 10 is an initial operation view of the upper part of the handle according to the present invention, and the operator pulls the handle upper part 70 as shown by the arrow (5). The plates 72 </ b> L and 72 </ b> R are retracted by the length of the long hole 73, and as a result, the lateral pipe portion 71 is detached from the U holder 69. Then, the handle upper part 70 is reversed forward as indicated by the arrow (6).
[0032]
FIG. 11 is a diagram showing the final stage of bending of the handle upper portion according to the present invention, and the handle upper portion 70 that has been fully reversed is retracted as shown by an arrow (7).
12 (a) to 12 (d) are explanatory views of the action of the long hole in the upper part of the handle according to the present invention. FIG. 12 (b) shows the plate 72L shown in FIG. From this state, as shown in (c), the handle upper part 70 is inverted by about 180 °, and in (d), the plate 72L is moved backward by L2 (L2 = L1).
[0033]
FIG. 13 is a side action diagram of the field cultivator according to the present invention. If the present invention is not applied, the field cultivator 10 is a three-dimensional object having a length A and a height B, which is a unit for storage or transportation.
If the present invention is applied, the resistance bar 19 is turned forward, the handle upper portion 70 is turned forward, and the cultivator 10 is moved backward by L2 so that the cultivator 10 has a length a (a <A) and a height b. An extremely compact three-dimensional object (b <B) can be obtained.
The operation handle 20 is contracted based on FIG. Since the handle upper portion 70 is a two-bar handle wider than the width of the engine 12, it can be stored to the side of the engine 12. As a result, the height b can be substantially matched to the ground height up to the top of the engine 12.
[0034]
The resin sleeve 40 described with reference to FIGS. 2 to 4 has lubricity and can be slid smoothly by being interposed between the handle post 26 and the slide shaft 27. The effect of suppressing wear of the handle post 26 and the slide shaft 27 is also exhibited. However, the resin sleeve 40 can be omitted and the slide shaft 27 can be directly inserted into the handle post 26.
[0035]
Further, in FIG. 6, the substantially horizontally placed pin 81 may be changed to the vertical direction, and the turning bracket 60 may be hooked on the fan plate 51 with the vertical pin. In this way, the peripheral wall 54 can be omitted. Therefore, the detailed structure of the fan plate 51 is not limited to this embodiment.
[0036]
In FIG. 1, the engine 13 is mounted on the casing 11, and the tiller shaft 17 is attached to the casing 11, thereby omitting the body frame and reducing the weight and cost of the tiller 10. However, a body frame may be prepared, the engine 13 may be mounted on the body frame, a gear case (reduction gear case) may be attached to the body frame, and the tilling shaft 17 may be attached to the gear case.
[0037]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
Claim 1 is a walk-type field cultivator in which a power source such as an engine is mounted on a body frame, a tilling claw driven by the power source is disposed under the body frame, and an operation handle is extended obliquely upward from a rear portion of the body frame. The handle that extends diagonally upward from the fuselage frame can be folded, and the upper part of the handle is flipped forward during transportation and storage. In addition, the upper part of the handle is retracted by the length of the long hole after turning. Therefore, it is intended to further reduce the size.
[0038]
If the handle upper part is removed in order to increase the storage efficiency of transportation and storage, the attaching / detaching work of the handle upper part is troublesome, and the removed handle upper part may be lost, which causes a decrease in the efficiency of farm work.
In this respect, in claim 1, there is no fear of losing the upper part of the handle without removing the upper part of the handle, and since it is only folded, there is no possibility of reducing the efficiency of agricultural work for that work.
[0039]
Further , a part of the operation handle is constituted by a handle post and a slide shaft, and the length of the operation handle is adjusted by sliding the slide shaft with respect to the handle post. As a result, the height of the grip from the ground can be changed, and the operability of the tiller can be improved.
[0040]
In addition , the upper part of the handle can be turned horizontally by interposing a fan plate and a turning bracket on the operation handle. It is effective to turn the upper part of the handle to the right or left when it is not desired to step on the cultivated soil immediately after plowing, and the operability of the cultivator can be improved.
[Brief description of the drawings]
FIG. 1 is a side view of a walking cultivator according to the present invention. FIG. 2 is an exploded perspective view of a vertical slide mechanism of an operation handle adopted in the present invention. FIG. 4 is a plan sectional view of a vertical slide mechanism of an operation handle according to the present invention. FIG. 5 is an exploded perspective view of a fan plate and a bent portion according to the present invention. FIG. 7 is a plan sectional view of a swivel holder according to the present invention. FIG. 8 is a plan view of a field cultivator according to the present invention. FIG. 9 is a perspective view showing a bent portion during operation. Fig. 11 is an initial action diagram of the upper part of the handle according to the present invention. Fig. 11 is an action diagram of the end of the upper part of the handle according to the present invention. Side action diagram [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Walking type tiller, 11 ... Airframe frame (casing), 12 ... Engine as a power source, 18 ... Tillage claw, 20 ... Operation handle, 21 ... Bending part, 22 ... Grip, 25 ... Lower part of handle, 26 ... Handle Post, 27 ... Slide shaft, 29 ... Handle post tightening mechanism, 30 ... Vertical slide mechanism, 31 ... Slot groove, 32 ... Band, 40 ... Resin sleeve, 51 ... Fan plate, 55 ... Stop hole, 60 ... Swivel bracket, 69: U holder, 70: Upper part of handle, 72L, 72R ... Plate, 73 ... Long hole, 75 ... Handle lock lever, 76 ... Long bolt, 77 ... Lock claw, 79 ... Lock nut, 81 ... Pin, 83 ... Spring, 85 ... T-shaped grip, LL ... Engine top level.

Claims (1)

In a walk-type field cultivator in which a power source such as an engine is mounted on the machine body frame, a tilling claw driven by this power source is arranged under the machine frame, and an operation handle is extended obliquely upward from the rear part of the machine frame.
The operation handle includes a bent portion at a level substantially equal to the upper surface level of the engine, and includes a long bolt extending laterally at the bent portion with a lower portion of the handle as a lower portion and an upper portion of the handle as an upper portion. The upper part of the handle can be turned forward around the bolt, and a long hole that engages with the long bolt is provided in the upper part of the handle, and the upper part of the handle is moved backward by the length of the long hole before the upper part of the handle is bent forward. And the upper part of the handle can be moved backward by the length of the long hole after folding the upper part of the handle forward .
The lower part of the handle comprises a handle post, a slide shaft that is slidably inserted into the handle post from above, and a handle post tightening mechanism that fixes the slide shaft to the handle post by reducing the diameter of the handle post. And
A fan plate is mounted substantially horizontally on the upper part of the slide shaft, a swivel bracket having a pivot point at the main position of the fan plate is mounted on the fan plate, the handle upper part is mounted on the swivel bracket, and a pin is mounted from the swivel bracket. The handle structure of the walking type tiller characterized in that the handle upper part is configured to be able to change the position of the upper part of the handle in the turning direction by selectively inserting it into a plurality of stop holes opened on the fan side. .

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